package com.huichaoliu.data;

import java.util.Date;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import android.util.Base64;

/*******************************************************************************
 * AES加解密算法
 * 
 * @author arix04
 * 
 */
/**
 * AES 是一种可逆加密算法，对用户的敏感信息加密处理 对原始数据进行AES加密后，在进行Base64编码转化；
 */
public class AES {


	/*
	 * 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。
	 */
	private static String sKey = "hcl2015121588888";
	private static String ivParameter = "0102030405060708";
	public static String Encrypt(String encData ,String secretKey,String vector) throws Exception {

		if(secretKey == null) {
			return null;
		}
		if(secretKey.length() != 16) {
			return null;
		}
		Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
		byte[] raw = secretKey.getBytes();
		SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
		IvParameterSpec iv = new IvParameterSpec(vector.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度
		cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
		byte[] encrypted = cipher.doFinal(encData.getBytes("utf-8"));
//		return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。
		return Base64.encodeToString(encrypted, Base64.DEFAULT);
	}


	// 加密
	public static String encrypt(String sSrc) throws Exception {
		Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
		byte[] raw = sKey.getBytes();
		SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
		IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度
		cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
		byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
//		return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。
		return Base64.encodeToString(encrypted, Base64.DEFAULT);
	}

	// 解密
	public static String decrypt(String sSrc) throws Exception {
		try {
			byte[] raw = sKey.getBytes("ASCII");
			SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());
			cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
//			byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密
			byte[] encrypted1 = Base64.decode(sSrc, Base64.DEFAULT);
			byte[] original = cipher.doFinal(encrypted1);
			String originalString = new String(original, "utf-8");
			return originalString;
		} catch (Exception ex) {
			ex.printStackTrace();
			return null;
		}
	}

	public static String decrypt(String sSrc,String key,String ivs) throws Exception {
		try {
			byte[] raw = key.getBytes("ASCII");
			SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			IvParameterSpec iv = new IvParameterSpec(ivs.getBytes());
			cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
//			byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密
			byte[] encrypted1 = Base64.decode(sSrc, Base64.DEFAULT);
			byte[] original = cipher.doFinal(encrypted1);
			String originalString = new String(original, "utf-8");
			return originalString;
		} catch (Exception ex) {
			return null;
		}
	}

	public static String encodeBytes(byte[] bytes) {
		StringBuffer strBuf = new StringBuffer();

		for (int i = 0; i < bytes.length; i++) {
			strBuf.append((char) (((bytes[i] >> 4) & 0xF) + ((int) 'a')));
			strBuf.append((char) (((bytes[i]) & 0xF) + ((int) 'a')));
		}

		return strBuf.toString();
	}
	
//	public static void main(String[] args) throws Exception {
//		
//		
//		// 需要加密的字串
//        String cSrc = "[{\"request_no\":\"1001\",\"service_code\":\"FS0001\",\"contract_id\":\"100002\",\"order_id\":\"0\",\"phone_id\":\"13913996922\",\"plat_offer_id\":\"100094\",\"channel_id\":\"1\",\"activity_id\":\"100045\"}]";
//        
//        // 加密
//        long lStart = System.currentTimeMillis();
//        String enString = AES.encrypt(cSrc);
//        System.out.println("加密后的字串是：" + enString);
//
//        long lUseTime = System.currentTimeMillis() - lStart;
//        System.out.println("加密耗时：" + lUseTime + "毫秒");
//        // 解密
//        lStart = System.currentTimeMillis();
//        String DeString = AES.decrypt("wRqJUxCnC4tGCV4I1ygKGs3v3nte5KLvSFlQqKfWHcc=");
//        System.out.println("解密后的字串是：" + DeString);
//        lUseTime = System.currentTimeMillis() - lStart;
//        System.out.println("解密耗时：" + lUseTime + "毫秒");
//		
//	}
}